import java.io.IOException;
import java.net.DatagramPacket;
import java.net.DatagramSocket;
import java.net.SocketException;
import java.net.URLDecoder;



/**
 * Created with IntelliJ IDEA.
 * Description:
 * User: 86183
 * Date: 2024-04-23
 * Time: 18:57
 */
public class UdpEchoServer2 {
    DatagramSocket socket = null;


    public  UdpEchoServer2(int port) throws SocketException {

        socket = new DatagramSocket(port);
    }
    public void start() throws IOException {
        System.out.println("服务器启动:");
        while(true){
            DatagramPacket requestPacket = new DatagramPacket(new byte[4096],4096);
            socket.receive(requestPacket);
           String request = new String(requestPacket.getData(),0,requestPacket.getLength());
           String response = process(request);
           DatagramPacket responsePackt = new DatagramPacket(response.getBytes(),0,response.getBytes().length,
                   requestPacket.getSocketAddress());
           socket.send(requestPacket);
            System.out.printf("[%s:%d] req=%s, resp=%s\n", requestPacket.getAddress(), requestPacket.getPort(),
                    request, response);
        }
    }

    private String process(String request) {
        return request;
    }

    public static void main(String[] args) throws IOException {
     UdpEchoServer2 udpEchoServer2 = new UdpEchoServer2(9090);
     udpEchoServer2.start();
    }
}
